Bump optional dependencies

Fixes #644

Author: acogoluegnes

pom.xml

@@ -54,10 +54,10 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-    <slf4j.version>1.7.29</slf4j.version>
-    <metrics.version>4.1.2</metrics.version>
-    <micrometer.version>1.3.2</micrometer.version>
-    <jackson.version>2.10.1</jackson.version>
+    <slf4j.version>1.7.30</slf4j.version>
+    <metrics.version>4.1.5</metrics.version>
+    <micrometer.version>1.4.1</micrometer.version>
+    <jackson.version>2.10.3</jackson.version>
     <logback.version>1.2.3</logback.version>
     <junit.version>4.13</junit.version>
     <mockito.version>3.3.3</mockito.version>